/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.karaf.diagnostic.core.providers;
import com.sun.management.HotSpotDiagnosticMXBean;
import org.apache.karaf.diagnostic.core.DumpDestination;
import org.apache.karaf.diagnostic.core.DumpProvider;
import javax.management.MBeanServer;
import java.io.File;
import java.io.FileInputStream;
import java.io.OutputStream;
import java.lang.management.ManagementFactory;
/**
* Create a heap dump.
*/
public class HeapDumpProvider implements DumpProvider {
public void createDump(DumpDestination destination) throws Exception {
File heapDumpFile = null;
FileInputStream in = null;
OutputStream out = null;
try {
MBeanServer mBeanServer = ManagementFactory.getPlatformMBeanServer();
HotSpotDiagnosticMXBean diagnosticMXBean = ManagementFactory.newPlatformMXBeanProxy(mBeanServer,
"com.sun.management:type=HotSpotDiagnostic", HotSpotDiagnosticMXBean.class);
heapDumpFile = File.createTempFile("heapdump", ".txt");
heapDumpFile.delete();
diagnosticMXBean.dumpHeap(heapDumpFile.getAbsolutePath(), false);
// copy the dump in the destination
in = new FileInputStream(heapDumpFile);
out = destination.add("heapdump.txt");
byte[] buffer = new byte[2048];
int l;
while (((l = in.read(buffer)) != -1)) {
out.write(buffer, 0, l);
}
} finally {
if (in != null) {
in.close();
}
if (out != null) {
out.flush();
out.close();
}
// remove the original dump
if (heapDumpFile != null && heapDumpFile.exists()) {
heapDumpFile.delete();
}
}
}
}